Tools & Wizards About Us
jsw.pl screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

jsw.pl

Jastrzębska Spółka Węglowa SA - JSW SA

Page Load Speed

4.4 sec in total

First Response

295 ms

Resources Loaded

3.9 sec

Page Rendered

232 ms

jsw.pl screenshot

About Website

Click here to check amazing JSW content for Poland. Otherwise, check out these important facts you probably never knew about jsw.pl

Grupa JSW to największy producent wysokiej jakości węgla koksowego typu 35 (hard) i znaczący producent koksu w Unii Europejskiej.

Visit jsw.pl

Key Findings

We analyzed Jsw.pl page load time and found that the first response time was 295 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

jsw.pl performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

36/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

27/100

25%

SI (Speed Index)

Value8.0 s

22/100

10%

TBT (Total Blocking Time)

Value450 ms

63/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value8.6 s

37/100

10%

Network Requests Diagram

jsw.pl

295 ms

www.jsw.pl

929 ms

merged-c7a04af47b742e9b5793a894a6f8734f-min.css

522 ms

merged-0c91c458e8b4774fc8d55ac5018a120b-min.css

858 ms

js

51 ms

Our browser made a total of 73 requests to load all elements on the main page. We found that 79% of them (58 requests) were addressed to the original Jsw.pl, 15% (11 requests) were made to Tools.eurolandir.com and 1% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Jsw.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 98.4 kB (22%)

Content Size

443.0 kB

After Optimization

344.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jsw.pl main page is 443.0 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 50% of websites need less resources to load. Images take 337.5 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 81.6 kB

  • Original 98.4 kB
  • After minification 97.8 kB
  • After compression 16.7 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 81.6 kB or 83% of the original size.

Image Optimization

-4%

Potential reduce by 14.7 kB

  • Original 337.5 kB
  • After minification 322.8 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. JSW images are well optimized though.

JavaScript Optimization

-24%

Potential reduce by 1.3 kB

  • Original 5.4 kB
  • After minification 5.4 kB
  • After compression 4.1 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 1.3 kB or 24% of the original size.

CSS Optimization

-40%

Potential reduce by 678 B

  • Original 1.7 kB
  • After minification 1.7 kB
  • After compression 1.0 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Jsw.pl needs all CSS files to be minified and compressed as it can save up to 678 B or 40% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (30%)

Requests Now

69

After Optimization

48

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 69 CSS, Javascripts, AJAX and image requests in order to completely render the main page of JSW. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jsw.pl

jsw.pl

295 ms

www.jsw.pl

www.jsw.pl

929 ms

merged-c7a04af47b742e9b5793a894a6f8734f-min.css

merged-c7a04af47b742e9b5793a894a6f8734f-min.css

522 ms

merged-0c91c458e8b4774fc8d55ac5018a120b-min.css

merged-0c91c458e8b4774fc8d55ac5018a120b-min.css

858 ms

js

js

51 ms

kqt3srn.css

kqt3srn.css

145 ms

cookie.min.js

cookie.min.js

40 ms

eurolandtoolsintegrationobject.js

eurolandtoolsintegrationobject.js

520 ms

merged-4e65a850bcb88308f4725170ea0227a6-min.js

merged-4e65a850bcb88308f4725170ea0227a6-min.js

929 ms

merged-a9c7653cd1575bb679a68c055d94b95e-min.js

merged-a9c7653cd1575bb679a68c055d94b95e-min.js

898 ms

scripts-min.js

scripts-min.js

539 ms

p.css

p.css

24 ms

496 ms

bip.svg

bip.svg

34 ms

rodo.svg

rodo.svg

35 ms

portal.svg

portal.svg

32 ms

mail.svg

mail.svg

50 ms

jsw.svg

jsw.svg

48 ms

facebook.svg

facebook.svg

52 ms

twitter.svg

twitter.svg

49 ms

insta.svg

insta.svg

69 ms

yt.svg

yt.svg

67 ms

linked.svg

linked.svg

67 ms

rss-white.svg

rss-white.svg

65 ms

search.svg

search.svg

69 ms

global.svg

global.svg

70 ms

logo-jsw-desktop.svg

logo-jsw-desktop.svg

85 ms

kontakt-menu.jpg

kontakt-menu.jpg

697 ms

csm_20230421-jsw-koks-kp-048_86a640f98a.jpg

csm_20230421-jsw-koks-kp-048_86a640f98a.jpg

795 ms

csm_20220831www-konferencja-wynikowa-1H-001_f680e4e8e8.jpg

csm_20220831www-konferencja-wynikowa-1H-001_f680e4e8e8.jpg

716 ms

csm_20240509www-eec-katowice-35_07daf4bb44.jpg

csm_20240509www-eec-katowice-35_07daf4bb44.jpg

101 ms

csm_IMG_1337_0a2fe84e5e.jpg

csm_IMG_1337_0a2fe84e5e.jpg

113 ms

csm_20240426www-zofiowka-rocznica-katastrof-019_468b75059b.jpg

csm_20240426www-zofiowka-rocznica-katastrof-019_468b75059b.jpg

130 ms

csm_20240416www-jsw-koks-jadwiga-spacer-004_3ab5f63ee2.jpg

csm_20240416www-jsw-koks-jadwiga-spacer-004_3ab5f63ee2.jpg

143 ms

metan-baner-na-nowe-www-20220318.jpg

metan-baner-na-nowe-www-20220318.jpg

157 ms

banner-30-lat-budryk1.png

banner-30-lat-budryk1.png

890 ms

csm_fundacja-jsw_a33e646cfd.png

csm_fundacja-jsw_a33e646cfd.png

955 ms

csm_kopalnia-wiedzy_df6bda1e80.png

csm_kopalnia-wiedzy_df6bda1e80.png

248 ms

csm_robota-na-grubie_9fc2aba967.png

csm_robota-na-grubie_9fc2aba967.png

248 ms

background.webp

background.webp

856 ms

kopalnie-ban-pl.jpg

kopalnie-ban-pl.jpg

1462 ms

od-wegla-do-stali.jpg

od-wegla-do-stali.jpg

1444 ms

edukacja-w-animacji-pl.jpg

edukacja-w-animacji-pl.jpg

1557 ms

logo-footer.svg

logo-footer.svg

876 ms

facebook.svg

facebook.svg

890 ms

twitter.svg

twitter.svg

904 ms

insta.svg

insta.svg

905 ms

yt.svg

yt.svg

898 ms

linked.svg

linked.svg

887 ms

rss.svg

rss.svg

897 ms

gpw.svg

gpw.svg

893 ms

wig20.png

wig20.png

904 ms

ue.svg

ue.svg

906 ms

nfos.svg

nfos.svg

910 ms

ministerstwo-rozwoju-i-technologii.png

ministerstwo-rozwoju-i-technologii.png

909 ms

arrow-right-orange.svg

arrow-right-orange.svg

1377 ms

ajax-loader.gif

ajax-loader.gif

658 ms

csm_robota-na-grubie_9fc2aba967.png

csm_robota-na-grubie_9fc2aba967.png

660 ms

csm_kopalnia-wiedzy_df6bda1e80.png

csm_kopalnia-wiedzy_df6bda1e80.png

672 ms

metan-baner-na-nowe-www-20220318.jpg

metan-baner-na-nowe-www-20220318.jpg

686 ms

slick.woff

slick.woff

1180 ms

EurolandToolAutoSizeObject.js

EurolandToolAutoSizeObject.js

112 ms

tabs.js

tabs.js

560 ms

style.css

style.css

116 ms

style.css

style.css

136 ms

120 ms

188 ms

231 ms

243 ms

SourceSansPro.otf

SourceSansPro.otf

757 ms

down.svg

down.svg

114 ms

cookieconsent.min.css

cookieconsent.min.css

21 ms

cookieconsent.min.js

cookieconsent.min.js

17 ms

Accessibility Review

jsw.pl accessibility score

94

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

Best Practices

jsw.pl best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

jsw.pl SEO score

100

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    PL

  • Language Claimed

    PL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jsw.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and it matches the claimed language. Our system also found out that Jsw.pl main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

jsw.pl

Open Graph data is detected on the main page of JSW. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: